After all, I found this week pretty weak especially because there wasn't that much new information. So I thought it would fit if the week were to end with something big, maybe even a character reveal as the release of the japanese version on the 3DS is getting closer.
What's interesting now is that this Friday there will be a Nintendo Direct with focus on 3DS games. We still have a bit more than 2 weeks until the japanese release. So it's time for more character reveals. A Direct would fit perfectly for another newcomer reveal with perhaps even few veterans being confirmed.
I don't think Metaknight was our last reveal before the release of the 3DS version of Smash Bros in Japan. Especially as Sakurai should be aware of the fact the roster will by then be known worldwide. So he can't keep the final roster hidden until the release in Europe, America and Australia. Therefore it makes sense to give us at least a last newcomer close to the japanese release.
Next up we have multiple options for reveals. There are leaked newcomers who could easily be shown, but Sakurai could also easily create some confusion by confirming a character who isn't in the leaked roster. As I keep thinking Sakurai is a troll he will probably show a character who is considered cut or not considered in the game as a newcomer.
Just give us a DK newcomer or Bandana Dee to create some confusion.
The only problem so far is that the Direct is as for now only announced for Japan. If we were to have a Direct in America and Europe too, I think we probably get a SSB4 newcomer.
Just my two cents.